/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.explorer.ui.management.deployment;

import com.vaadin.data.Item;
import com.vaadin.data.Property;
import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.ui.Table;
import org.activiti.explorer.ExplorerApp;
import org.activiti.explorer.data.LazyLoadingContainer;
import org.activiti.explorer.data.LazyLoadingQuery;
import org.activiti.explorer.navigation.DeploymentNavigator;
import org.activiti.explorer.navigation.UriFragment;
import org.activiti.explorer.ui.Images;
import org.activiti.explorer.ui.management.ManagementPage;
import org.activiti.explorer.ui.util.ThemeImageColumnGenerator;


/**
 * @author Joram Barrez
 */
public class DeploymentPage extends ManagementPage {

    private static final long serialVersionUID = 1L;

    protected String deploymentId;
    protected Table deploymentTable;
    protected LazyLoadingContainer deploymentListContainer;
    protected DeploymentFilter deploymentFilter;

    public DeploymentPage() {
        ExplorerApp.get().setCurrentUriFragment(
                new UriFragment(DeploymentNavigator.DEPLOYMENT_URI_PART));

        deploymentFilter = ExplorerApp.get().getComponentFactory(DeploymentFilterFactory.class).create();
    }

    public DeploymentPage(String deploymentId) {
        this();
        this.deploymentId = deploymentId;
    }

    @Override
    protected void initUi() {
        super.initUi();

        if (deploymentId == null) {
            selectElement(0);
        } else {
            selectElement(deploymentListContainer.getIndexForObjectId(deploymentId));
        }
    }

    @Override
    protected Table createList() {
        final Table deploymentTable = new Table();

        LazyLoadingQuery deploymentListQuery = new DeploymentListQuery(deploymentFilter);
        deploymentListContainer = new LazyLoadingContainer(deploymentListQuery, 30);
        deploymentTable.setContainerDataSource(deploymentListContainer);

        // Listener to change right panel when clicked on a deployment
        deploymentTable.addListener(new Property.ValueChangeListener() {
            private static final long serialVersionUID = 8811553575319455854L;

            public void valueChange(ValueChangeEvent event) {
                Item item = deploymentTable.getItem(event.getProperty().getValue()); // the value of the property is the itemId of the table entry
                if (item != null) {
                    String deploymentId = (String) item.getItemProperty("id").getValue();
                    setDetailComponent(new DeploymentDetailPanel(deploymentId, DeploymentPage.this));

                    // Update URL
                    ExplorerApp.get().setCurrentUriFragment(
                            new UriFragment(DeploymentNavigator.DEPLOYMENT_URI_PART, deploymentId));
                } else {
                    // Nothing is selected
                    setDetailComponent(null);
                    ExplorerApp.get().setCurrentUriFragment(new UriFragment(DeploymentNavigator.DEPLOYMENT_URI_PART));
                }
            }
        });

        // Create column headers
        deploymentTable.addGeneratedColumn("icon", new ThemeImageColumnGenerator(Images.DEPLOYMENT_22));
        deploymentTable.setColumnWidth("icon", 22);

        deploymentTable.addContainerProperty("name", String.class, null);
        deploymentTable.setColumnHeaderMode(Table.COLUMN_HEADER_MODE_HIDDEN);

        return deploymentTable;
    }

}
